package com.nowcoder.community.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

public class CookieUtil {

    //封装一个从cookie获取值的方法
    public static String getValue(HttpServletRequest request,String name){
        if(request == null || name == null){
            throw new IllegalArgumentException("参数为空");
        }

        Cookie[] cookies = request.getCookies();

        if(cookies != null){
            for (Cookie cookie : cookies) {
                if(cookie.getName().equals(name)){
                    return cookie.getValue();
                }
            }
        }

        return null;
    }
}
